Question

A car is
is travelled a distance of sonts with
an acceleration 5 m/sec in
4 seconds. Find
ilts
speed​

Answer 1

Answer:

20 m/s

Explanation:

Question correction :

A car starts from rest and goes with an acceleration of 5 m/s² and continues for 4 seconds. Find its speed after 4 seconds

Given :

• Acceleration of the car = a = 5 m/s²

• Time accelerated for = t = 4 seconds

• Initial velocity = u = 0 m/s

To find :

• Final velocity of the car

Using the first equation of motion :

V=u+at

V=0+5×4

V=20 m/s

The final velocity of the car is equal to 20 m/s

Answer 2

Given :

▪ Initial speed of car = zero (i.e. rest)

▪ Acceleration of car = 5m/s²

▪ Time interval = 4s

To Find :

▪ Final speed of car after the given interval of time.

Solution :

↗ Here, acceleration of car has constant magnitude throughout the motion so we can apply equation of kinematics to solve this question.

$:\implies\tt\:\red{v=u+at}\\ \\ :\implies\tt\:v=0+(5\times 4)\\ \\ :\implies\underline{\boxed{\tt{\orange{v=20\:ms^{-1}}}}}$

⚠ Additional Information :

• Acceleration is a vector quantity.
• It has both magnitude as well as direction.
• It can be positive, negative or zero.
• Acceleration is defined as the rate of change in velocity.